Process for producing an alumina-zirconia composite sintered material

Abstract From the Canadian patent

Alumina-zirconia composite sintered materials having sufficient high-temperature strength and thermal shock resistance as well as excellent mechanical strength are made by mixing Bayer alumina and/or bauxite as an alumina and baddeleyite and/or zircon sand as a zirconia material in amounts of 50 to 95% by weight of alumina, the balance being zirconia respectively, subjecting the mixture to heating melting and, quenching, grinding the resulting solid to an average grain size of 10 µm or smaller, and subjecting the resulting powder to molding and sintering.